If yours are like mine and have saved the BOM to "My Classes." Then when you are in the "my classes" and have chosen the specific class there is a tool bar across the top. Click on the option that says "materials." It will list the lessons. As you click on each of the lessons, you will see a prompt that says "preview." When you click on it, it will preview what the lesson looks like in a box on the right side of the screen. At the top of this box there is a statement "Download this file." I think this is what you are looking for.